#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<assert.h>
char* my_strcpy(char* dest, const char* src)
{
	char* ret = dest;
	assert(dest != NULL);
	assert(dest != NULL);
	while ((*dest++ = *src++))
	{
		;
	}
	return ret;
}
int main()
{
	char dest[] = "*****************";
	char src[] = "hello world";
	my_strcpy(dest, src);
	printf("%s", dest);
	return 0;
}